High dielectric porcelain composition and method of reducing sintering temperature thereof

Abstract

A high dielectric porcelain composition having, as a main component, a Pb(Mg 1/3, Nb 2/3)O 3 -PbTiO 3 -Pb(Mn 1/3, Nb 2/3)O 3 system including 95 mol. % of Pb(Mg 1/3, Nb 2/3)O 3 , 5 mol. % of PbTiO 3 and 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O 3 , and, in addition, a sub-component including PbO and ZnO. Such a dielectric porcelain is capable of being sintered at a temperature lower than 1000° C. A method of reducing the sintering temperature of such a high dielectric porcelain composition, is also provided.

What is claimed is: 
     
       1. High dielectric porcelain composition consisting essentially of a Pb(Mg 1/3, Nb 2/3)O 3  - PbTiO 3  - Pb(Mn 1/3, Nb 2/3)O 3  system having about 95 mol. % of Pb(Mg 1/3, Nb 2/3)O 3 , about 5 mol. % of PbTiO 3 , about 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O 3 , and having distributed therethrough, in addition, a sintering temperature lowering effective amount of PbO and ZnO, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.25-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3  - PbTiO 3  - Pb(Mn 1/3, Nb 2/3)O 3  system, and   wherein said sintering temperature lowering effective amount includes about 50-93% by weight of said PbO and about 7-50% by weight of said ZnO.   
     
     
       2. The composition of claim 1, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.3-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3  - PbTiO 3  - Pb(Mn 1/3, Nb 2/3)O 3  system. 
     
     
       3. The composition of claim 2, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.5-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3  - PbTiO 3  - Pb(Mn 1/3, Nb 2/3)O 3  system. 
     
     
       4. The composition of claim 1, wherein said sintering temperature lowering effective amount includes about 67-90% by weight of said PbO and about 10-33% by weight of said ZnO. 
     
     
       5. The composition of claim 4, wherein said sintering temperature lowering effective amount includes about 80-90% by weight of said PbO and about 10-20% by weight of said ZnO. 
     
     
       6. Method of reducing sintering temperature of a high dielectric porcelain composition consisting essentially of a Pb(Mg 1/3, Nb 2/3)O 3  - PbTIO 3  - Pb(Mn 1/3, Nb 2/3)O 3  system having about 95 mol. % of Pb(Mg 1/3, Nb 2/3)O 3 , about 5 mol. % of PbTiO 3 , and about 0.5 weight % of Pb(Mn 1/3, Nb 2/3)O 3 , which comprises, in addition, incorporating therein a sintering temperature lowering effective amount of PbO and ZnO, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.25-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3  - PbTiO 3  - Pb(Mn 1/3, Nb 2/3)O 3  system, and   wherein said sintering temperature lowering effective amount includes about 50-93% by weight of said PbO and about 7-50% by weight of said ZnO.   
     
     
       7. The method of claim 6, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.3-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3  - PbTiO 3  - Pb(Mn 1/3, Nb 2/3)O 3  system. 
     
     
       8. The method of claim 7, wherein said sintering temperature lowering effective amount of said PbO and ZnO is between about 0.5-1.25% by weight of the weight of said Pb(Mg 1/3, Nb 2/3)O 3  - PbTiO 3  - Pb(Mn 1/3, Nb 2/3)O 3  system. 
     
     
       9. The method of claim 6, wherein said sintering temperature lowering effective amount includes about 67-90% by weight of said PbO and about 10-33% by weight of said ZnO. 
     
     
       10. The method of claim 9, wherein said sintering temperature lowering effective amount includes about 80-90% by weight of said PbO and about 10-20% by weight of said ZnO.